I’ve got plaster walls with a veneer finish over blueboard. During the course of my addition, there are several spots where I need to do significant patches. Anywhere from 2″ x 2″ to 18″ x 24″. How do I prep for these patches? I’m sure I can put in some type of backer to hold the blueboard patch, but how do I prep the veneer around the outside of the patch so the tape doesn’t show as a bulge? Or do plasterers not use tape on patches?
Thanks for any help you can give.
Replies
I would carve a recess for tape. One way to achieve this is with a Hyde paint scraper. You will have to resharpen after only a few strokes with a file but it won't take long to get deep enough. If the veneer layer is thick enough, I would use fiberglass tape, you just put it on and go. If the plaster is a thin skim, then I would use paper tape. You need to be careful that the paper is well bonded, no bubbles, doesn't float out too proud, etc. I would go with Durabond 90 rather than the original plaster. Use several thin skims till you can polish. That way, you won't have to sand anything.
Hi PaineB. The paint scraper trick is Very Smart.And the durabond is a good choice. The only problem I can see using the Durabond is the polish.
The best method that we found was to use regular Joint compound mix with plaster of Paris and latex primer paint.we be using this mix for over 20 years and the results 're excellent.
And when you get good with it you can patch and plaster anything. You can even apply the mix with rollers and go back with a trowel and make it smooth like glass. its very easy to use,very forgiving and you can work with it until is perfect.
're u going to RhodeFest? I be there Sat.
YCF Dino
I was thinking that I should have mentioned that it is difficult to polish with Durabond (Even stiltstriding tapers prefer to finish with non setting type compound when polishing). Your technique, however, is very interesting. I have a couple of questions about it:
Since your basically talking about a "hot mix" with the addition of primer, do you make a donut of compound, put primer in the ring, and sprinkle the Plaster of Paris into the liquid until enough is soaked up to make a batch of one consistency when turned?
When you talk about using rollers, I get images of machine mixing a certain proportion of each substance. Do you have a rule of thumb of how you do that? If you don't paddle mix, how do you get it to be that liquid and not be just a hodge podge of different materials? When you mix as a thicker mud you can see how much or little the stuff is intermixed.
I must confess that I have only just heard of the RhodeFest recently as I have only checked out this board for a week so far. My wife has already scheduled my next weekend.
When you do few repairs,spread the compound even over a flat board. then spread the plaster of paris over the compound and mix it using a tape knife. Before the mix is uniform spread it again and pure the latex primer.Mix it again to a uniform look and you're ready to go.
The whole thing can take you 3-5 minutes. The safe mix is 20-1-1. For large and dip repairs you can go to 20-3-3. You will find The exact amounts after you get use to this.
For large areas skim coat(whole wall or room)I use 3 gallons of compound 1/2 of coffee cap(plaster of paris) and 3/4(Gallon) of latex primer.Power mix and apply with roller.
Unlike the durabond or the diamond plaster this mix can be polish even when is dry by spraying some water.And you can do some interesting knock down finishes with out the need to polish. But you know this is more hands on exp. kind of deal. You have to spend some time to get use to. (30 minutes).
Edited 8/10/2004 10:40 pm ET by YCFriend
Thank you, YCFriend.
I will be trying this method before the week is out. Going along the same line of thought, have you ever experimented with latex admix in lieu of primer? Just curious. Paint is much cheaper, of course, but I wonder what properties a mix with Latacrete, (with its high viscosity), might possess.
I better learn the basic technique before trying to be a rocket scientist.
Hi PaineB. All latex primers can work with this Mix but I have to stop over the Home Depot to get the name of the one that worked better than others.
3 years ago we perfect the method by luck.And this primer was the right stuff.
I give you the name later.
YCF Dino
veneer plaster
YCF Dino,
What mix are you using these days?
Janet